Lead pencil



A. PQLLAK 'LEAD PENCIL Sept 23 1924.

Filed July 15 Ai922 INVENTOR: A/Aw /Oazza/f ATTORNEY.

hated sept. z3, 1924.

gonal head to enga UNITED STATES umani PoLm, 'or New Yoan, N. Y., YORK,

ASSIGNOB T0 SAMUEL BANNER, N. Y.

0F NEW' LEAD PENCIL.'

Application filed July 15,

To all 'wlwm 2'# may concern.'

Be it known that I, Aimrnm Pollux, a citizen of the United States, and a resident of New York city, in the county of New York and. State of New York, have invented certain new and useful Improve- .ca-l novel lead pencil in the use of which on the rotation in one direction'of a part of the pencil, the stick of lead may be propelled forwardly to expose its outer end or writing purposes and -on the rotation of said part 1n a reverse direction the stick of lead will be 'retracted within die pencil.

Another object of the invention is to Erovide a novel construction of pencil in W ich the stick or piece of lead after having been suiciently consumed by use, may on the rotation of a part of the pencil, be wholly expelled from the pencil.

A further purpose4 of the invention is to provide an entirely etlicient pencil of substantially miniature dimensions and light'in weight, so that the pencil will occupy lbut small spacein a pocket book or vest pocket, the preferred dimensions on which I have constructed the pencil being about 4three inches in length and about one-eighth of an -inch in diameter.

A further purpose of the invention is to provide a pencil structure in -which the exterior casing of'the pencil directly cooperto do with the projection and retraction of the stick of lead, and to this end I make the exterior tubular casing of the pencil of polygonal cross-section and provide onthe spirally threadedA propeller shaft or screw a polygonal head to engage the inner walls of said casing and on the lead-clutch a pol said inner walls, said heads'being capab e of sliding movement against the inner surfaces of the exterior casing, but incapable of rotation on account im. sei-iai no. 515,279.

of their engagement with said surfaces. By

reason of the direct cooperative relation just referred to between the exterior casing and the interior mchanism ofthe pencil, I eliminate many mechanical parts of encils as heretofore constructed and am ab e to producea highly-'etlicient pencil of sim lified construction and reduced diameter and) light in weight, and in addition the pencil is one notliable to get out of Working condition with ordinary use.

The invention will be fully understood from the detailed description hereinafter presented, reference being had to the accompanying drawings, in which:

Fig. 1 is a central longitudinal section, on a greatly enlarged scale, through a lead pencil constructed in accordance with and embodying the invention;

Fig. 2 is a corresponding view of the exterior tubular casin of the pencil;

Figs. 3, 4 and 5 sow the respective parts of the lead holding and lactuating mechanism finally disposed within the exterior casing of the pencil, these parts when inserted within th exterior casing being assembled in longitudinal relation in the manner hereinafter described;

Fig. 6 is a longitudinal section of an inner .rear rotatable tubular member of the pencil, this tube having a nut formation at its inner end to engage the spiral shaft shown in Fig. 5 and at its outer end being adapted to receive a cap or Ahead and swinging eye in the manner shown in Fig. 1;

Fig. 7 is a detached longitudinal section through the outer end cap or head for the v pencil;

Fig. 8 is a detached side elevation of the swinging eye for the tube and head shown in Figs. 6 and 7, 4said eye being shown in initia spread condition preparatory to having its side members squeezed or closed toard each other to the position shown in 'n l I u l F 1g. 9 1s a perspective view, on an en-` larfred scale, of the complete pencil;

lig. l0 is a longitudinal section throu h the forward portion of the pencil, the mec 1- anism being shown as in the operation of expelling a short piece of lead from the Y pencil Fig. 11 is a transverse section, on a greatly enlarged scale, through the pencil taken on the dotted line 11-11 of Fig. 1, and

Fig. 12 is a corres onding section through tlhe same'taken on t e dotted line 12-12 of `i f.' 1.

ln the drawings 15 designates the exterior shell or casing of the pencil, and said casin is preferably in one integral tubetapere at its forward end to form a conical ti -member 16 through the forward end of which the lead 17 is projected, when desired, for Writing purposes. The body of the casin 15 is polygonal in cross-section, as shown.

Vithin the rear portion of the casing 15, is located a tube 18 which is in relative rotary relation to said casing, said tube be1ng capable of being turned axially withln the casing to effect the projection or retraction of the lead 17 while the casing is held stationary or said casing being capable of being turned axial'l around said tube for the same purpose .w ile the tube is held stationary.

The' forward end of the tube 18 1s contracted and screw-threaded to form a nut 19, as shown in Fig. 6, this nut therefore being integral with the tube, whose bodyportion constitutes a tubular stem for rotating said nut or holding the nut stationary while the casing 15 is being rotated around it. The rear end of the tube 18 is contracted, as at 20, to form an annular shoulder 21 whose purpose will be hereinafter explained. The contracted portion 2O of the tube 18 is formed in opposite sides with aligned apertures 22 to receive the transverse ends 23 of the side members of the swinging eye 24, as explained hereinafter.

The o erative mechanism occupying a central on itudinal position within the 4penciland y means of which the lead. is

ropelled forwardly or retracted rearwardl)y on the rotation in onev direction or .the other of the tube 18, is shown detached in Figs. 3, 4,v 5 and consists of a spirallyI threaded rod or screw 25 having on its forward end a polygonal head 26 containing a threaded recess 27, a propeller rod 28 threaded on its rear end'to be screwed into saidv recess 27 and having on its forward end a head or section 29 of somewhat greater diameter than the body of the rod 28, a coiled spring 30 confined on the rod 28 (Fig. 10), and a tubular lead-clutch or member 31 which has on its rear end a polygonal head 32 (Fig. l1) and forwardly projecting slit sides 33 to'grasp the lead 17. The head 32 has a hole 34 in it, and in the assembly of the parts the bare rod 28 is, starting at its rear threaded end, inserted into the clutch member 31 from the forward end thereof and through the hole 34 until the head 29 onsaid rod abuts against the inner surface of` the head 32 at said hole, and

thereafter the spring 30l is placed upon the rod 28 and compressed to some extent thereon, whereupon the threaded rear end of the rod 28 is screwed into the recess 27 of the head 26 on the spirally threadedrod-or screw 25, the spring 30 then bein confined between the head 32 of the clutc 1 member 31 and the headw 26 on the rod' or screw 25. The head 29 on the rod 28 is adapted to have longitudinal movement within the clutch member 31 and at its forward end directly ngage the end of the lead 17, as shown in he poly onal head 26 on .the rod or screw 25 an the polygonal head 32 on the clutch member 31 conform to the interior cross-section of the polygonal casing or tube 15 within which they are placed, as shown in Figs. 1 and 10, the forward edge of the head 32 being ressed, by the sprin 30, against the shou der 35 formed on sai casing by its contraction to createthe tipmember 16, said shoulder serving as a stop to restrain the clutch member within the tube 15. The heads 26, 32A are prevented from rotating Within the casing or tube 15.

by reason of the polygonal cross-section of said heads and casin and hence the screw or rod 25, rod 28 anu clutch member'31 can have no rotary motion within said casing. The heads 26, 32 may, however, have longitudinal sliding movement within the casing tube 15, and 1n Figs. land 10. I illustrate said heads in two positions.- The means for propelling the heads 26, 32 and with'them the rod 28 and clutch member 31, forwardly to expose or wholly eject the lead 17 and for retracting said heads, rod and clutch vmember to withdraw the lead into the pencil, 1

consist of the rotary tube' 18, nut 19 and rod or screw 25, said rod or' screw `movingforwardly when the said tubeand nut are turned in one direction and rearwardly when said tube and nut are turned or ro- Y tated in the reverse direction. The clutch member 31 will permit the lead V17 to Abe forced through it for exposure or expelling purposes but will, by reason of its spring sides, sufiiciently bind againstthe lead to said member 31, rod 28 andrrod or screw 25 are retracted mwardly. The clutch mem- -withdraw the lead intoY theY pencil when ther ber 31, rod 28 and screw 25`Vmove forwardly with substantial uniformity until thehead 32 meets the stop shoulder 35, as in Fig. Y10,

and during this movement the head 29 onv the rod 28 exerts a Vyielding pressure on the lead due to the presence-of the spring 30 hetween the member 31 and head 26, and this is a feature of advantage and avoids a harsh of the rod 28 and its 13o Lacasse casing 15 and are .then further turned in the same direction to pro el the rod 28 and its head 29v along throng the clutch member 31 and against the piece of lead 17 until said piece has been expelled, this operation of the parts being indicated in Fig. 10. During thls final forward Ero lling movement y ea 29 to expel the lead, the clutch member 31 ed by the shoulder 35 andthe spri'n 30 becomes compressed between the clutc member and the head 26, which travels forwardl with the rod 28, and this compression of the spring ermits the rod 28 to continue in movement yond its normal throw while the clutch member 31 is stationary. The

l spring 30 normally acts to press the clutch member 31 forwardly against the rear end of the head 29 on the rod 28, butwhen the clutch member becomesV arrested by the shoulder 35, said spring by becoming comressed permits the rod 28 to continue in orward movement for exposing or expellin the piece of lead.

.he rotation of the tubular and nut 19 to cause the traveling movement of the rod or screw 25 and its connected parts, is effected by -holding the main casing 15 stationary and turning, with the thumb and finger, a cap 36 which I apply on the rear end of the pencil or turning the eye 24 with which the said cap is interlocked. After the interior parts shown in Figs. 3, 4 and 5 have been assembled and introduced into the casing 15 through the rear end thereof, the nut-tube or operating member 18 is inserted' into the rear end' of the casing 15 and screwed upon the rod or shaft 25, or if preferred the-tube 18 may first be screwed upon the rod 25 and said parte then assembled may bc introduced into 'the casing 15. After the parts shown in Figs. 3, 4, 5 and 6, have been introduced into the casing 15, the rear edge of said casing is flanged inwardly, as at 37, 4in rear of the shoulder 21 on the tube 18, this serving to lock the tube 18 and its associated' parts within said casing and prevent said tube from traveling outwardly from the casing under the thrust of the screw or threaded rod 25.

The cap 36 is of hollow dome-shape and ornamental in character and covers the rear projecting end of the tube 18, and said cap is fianged inwardly at its forward edges, asA vat 38, to engage and turn on the rear end of the casingl 15 about the flange 37 thereof.

The cap 36 is formed in its opposite sides' with corresponding apertures 39 which align with the apertures 22 in the operating tube 18. The eye or loop 24 is secured in position bv being bent or having its side members closed toward each other to carry the transverse members 23 through the opposite apertures 39, 22 of said cap 36 and tube becomes arrest- 18, as shownin Fig. 1, said members 23 then interlocking the tube 18 and cap 36 together, applied to the eye or loop will also be imparted to the cap and tube, and also so that a rotary turning'movement applied directly to the cap will be communicated to the tube .18. The cap 36 serves as means for rotatlng the tube 18 whenthe casin 15 is held stationary and as means for olding the tube 18 stationary should the casing 15 be rotated. The eye or loop 24 may swin or turn and serves as means for suspen ing the pencil from a cord or ribbon, and otherwise the members 23 thereof merely serve to in the cap 36 and tube 18 together.

en the lead 17 is to be introduced into the pencil, the cap 36 and nut-tube 18 will be turned to propel the screw 25 and its connected parts forwardly until the clutch member 31 is within the tip-member 16, and thereupon-the piece of lead will be inserted endwise through said member 16 and into g the member 31, after which the tube 18 will member 18 be yof the screw 25 and its connected parts so as to project the forward end of the lead through the tip-member 16 or to the position shown in Fig. 1. After the use of the pencil dias ceased, the lead will be retracted into the pencil by turning .c the tube 18 to effect that result. When the piece of lead has become sufiiciently consumed by use, the tube 18 will be turned to cause the head 29 on the propeller rod 28 so that a rotaryturning movement the clutch member 31, of the to expel the short piece of lead in the manner shown in Fig. 10.

There is a direct cooperation between the exterior polygonal casing 15 and the polygonal heads 26, 32 of the lead holding and actuating mechanism, and hence I am enabled toproduce a pencil of simplified construction and reduced diameter.

I do not limit the invention to all the details of form and construction shown,

since I am aware that some of these details may be modified, while carrying m invention into effect, within the scope o the ap- .Y

pended claims.

What l claim as mv invention and desire to secure by Letters Patent, is

1. 'Alleud' pencil comprising an exteriorV tubular polygonal casing having at its forward end a tip-member, a rear interior rotary tube having at its rear end means for imparting rotary mot-ion thereto and at its front end a nut, and lead-holding and pro-` pelling means within said casing comprising a spirally threaded screw engaging said lengaging e nut and extending within said tube and having on its forward end a polygonal head engaging the inner walls of said easing, and a lead clutch member .connected with said polygonal head and having a polygonal head the inner'walls of said easing.

ad pencil comprising an exterior tubular iolygonal casing having. at its forward cnil a tip-member, a rear interior rotary tube having at its rear end means for iiiipartinf1r rotary motion thereto and at its front end a nut, and lead-holdingv and propelling means within said casing comprising a s iirally threaded screw engaging said nut and extending within said tube and having on its forward end a polygonal head en-v gaging the inner walls of said casing, a lead clutch member having a polygonal head engaging the inner walls of said casing, a

pro eller rod connected with the head on sai( screw and having a head within and slidable along said clutch member when said member is arrested at the tip portion of the exterior casing, and means on said rod normally holdin" said clutch member in engagement witi the head on said rod.v

A lead pencil comprising an exterior tubulin' polygonal easing having .at its forward end a tip-member, a rear interior rotary tube having at its rear end means for imparting rotary motion thereto and lat its' front en a nut, and lead-holding and propelling means within said casing comprising a. s iirally threaded screw engaging said iuit and extend-ing within said tube and having on its forward end a polygonal head engaging the inner walls of said casing. a lead -eluteh member having a polygonal head engaging the inner walls of said easing, a propeller .rod connected with the head on said screw and having a head within and slidable along said clutch member when said' member is arrested at the tip 'portion of the exterior casing, and a spring on said rod normally holding said clutch member in engagement with the. head on said rod.

4. A lead pencil comprising an exterior tubular polygonal easing havin" at itsl for- 'i ward end a ti i member, a sph-ally threaded screw adapteA for longitudinal movement within said Acasing and. having on its forward end a polygonal guiding head in en gageinent with the inner walls of said eas-A ing, arotary threaded means engaging said screw andhaving means for the manual rotation'of the same, and `a lead clutch ineinber connected with saidpolygonal head and having a head engaging the inner walls of 5. A 'lead pencil comprising an exterior tubular polygonal casing having at its forward end a tip member, a spirally threaded screw adapted for longitudinal movement within said casing and having on'its inner end a polygonal guiding head in engagement with the inner walls of said casing, `rotary threaded means engaging said screw and having means for the manual rotation of the same, a lead clutch member having a head, a propeller rod connected with said pol gona head and having a forward head wit iin and slidable along j ber when said member as arrested at the tip portion of said casing, and means on said rod norinallv holding said clutch membei in engagement with the head en said rot.

A lead pencil comprising an exterior `tubular olygonal easing having at its forward en a ti member, a s irally threaded screw adaite for longitu in al movement within sai casinir and having on its inner end a polygonal guiding head in engagement with the inner walls of. said casing, rotary threaded means engaging said screw and having means for the manual rotation ot' the same, a lead clutch member having a head, a propeller rod connected with said polygonal head and having a forward head within and slidable along said clutch member when said member iav arrested atthe tip` portion of said casing, and a spring on said rod n ornially holding said clutch member in engagement with the head'on said rod.

7. A lead pencil comprising anv exterior tubular polygonal casing having fat its forward end a tip member, arear interior rotary tube having its rear end projected beyond said Casin(r and at its forward end a nut, said tube iavin'g` a shoulder near the rear end of saideasing and said easing at its said end being flanged inwardly over said shoulder to lock the tube in iosition, means associated with the projecting rear end of said tube for imparting rotary niotioii to the tube, and lead-holding and prosaid clutch meinpeiling means within said easing comprising a spirally threaded screw engaging said mit and extending within said tube and having on its forward end a polygonal head engaging the. inner walls of said casing, and a lead clutch member connected with said `polygonal head and having a polygonal head engaging the inner walls of Said easing.

tubular polygonal casing having at its forward end a tip member, a rear interior rotary tube ,having itsrear end projected beyond said casing and at its forward end a nut, said tube having' a shoulder near the rear end of said casing and said casing at its said end being flanged inwardly over said shoulder to lock the tube in osition,

8. A lead pencil comprising an exterior' means associated with the' projecting rear end of said tube for imparting rotary motion to the tube, and lead-holding and propelling means within said casing comprising a spirallythreaded screw engaging said nut and extending within said tube and having the rear end of said exterior casing and.v l@ ing on its forward end a pol gonal head a split eye or loop whose end portions exengaging the inner walls of saidY casing, and tend through corresponding apertures in a lead clutch member connected with said said tube and cap. polygonal head and having a polygonal Signed at New York city, in the county head engaging the inner Walls of said casof New York and State of New York, this l5 ing, the means for imparting rotary motion 13th day of July, A. D. 1922.v

to said tube comprising a cap enclosing the v projecting rear end of the same and engag- ABRAHAM POLLAK. 

